If you like our work please consider becoming a Supporter and get an ad-free experience.
I just installed the Tekkit Launcher (build 253) and attempted to add the Sphax PureBDcraft texture pack. I have followed the instructions given in the "How to Install" page (link) but when I attempt to select the texture pack in Tekkit, the default Minecraft texture pack remains.
I did see the previous thread describing a similar issue (link) and attempted using a lower resolution version of the texture pack. I did not attempt to allocate extra RAM to Minecraft.
I have attempted to use resolutions 128x128, 64x64, 32x32, and 16x16, with no sucess. The texture packs are in the folder that opens directly from the "Texture Packs" screen when in-game. I have observed, however, that the Technic launcher file structure is different from the one in the "How to Install" video by Mindcrafters, which complicates following HanFox's other tip of deleting the clay folder difficult.
I have uploadedimages of my Technic folder here. Pleaes let me know if any additional views would be helpful.